LEGO SYSTEM Trains : 8546


Trains / 8546	8545 \| 8547

Subject:	Re: "No Contact" Homebrew Train Sensor for Mindstorms
Newsgroups:	lugnet.trains, lugnet.robotics
Date:	Tue, 5 Dec 2000 19:32:18 GMT
Viewed:	1610 times

In lugnet.trains, Eric Kingsley writes: > In lugnet.trains, Chris Phillips writes: > > As has already been reported by others, I built an automated railroad > > crossing for the NELUG train display at last weekend's Greenberg show. I > > wanted to take a moment to describe the "homebrew" sensor that I used to > > detect an approaching train so that others might benefit in their own layouts. > > I might just add that while this was a bit over my head it work extremely well > and the sensor itself was very small and unobtrusive. It was a non-LEGO > solution but I loved it and recommend it. > > I think with some reworking it may even be possible to hide the sensor in/under > one of the ties themselves. Is there a photo that clearly shows the sensor in a fairly tight closeup so that it can be judged how obtrusive/invisible it is? I skimmed through many of the photos posted by you, Dave, and Tim but did not see one, although I may have missed it... Thanks!

Message has 2 Replies:

		Re: "No Contact" Homebrew Train Sensor for Mindstorms
(...) 1) take a section of straight track. 2) take a light gray 2x4 plate and place it so that it spans the 2-stud gap between two of the ties. 3) imagine a very thin silver piece lying on that. That's it. Most of the people I talked to about it (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)

		Re: "No Contact" Homebrew Train Sensor for Mindstorms
(...) I know I didn't get a close up because my camera stinks for close ups. I think Chris may have gotten some but he hasn't uploaded his pic's just yet. If we don't have one now, we are having a meeting in a couple weeks and we will make sure to (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics, lugnet.org.us.nelug)

Message is in Reply To:

		Re: "No Contact" Homebrew Train Sensor for Mindstorms
(...) I might just add that while this was a bit over my head it work extremely well and the sensor itself was very small and unobtrusive. It was a non-LEGO solution but I loved it and recommend it. I think with some reworking it may even be (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)

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